A host of start-up companies are exploring ways to harness the enormous amount of wind energy that flows at high altitudes in the atmosphere. But as these innovators are discovering, the engineering and regulatory challenges of high-altitude wind power are daunting.READ MORE

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California-based Makani Power has developed airborne wind technology that is moving close to deployment. The fixed-wing aircraft rotates at variable altitudes while tethered to a generator. (Makani Power)

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The Warriors of Qiugang, a Yale Environment 360 video, chronicles a Chinese village’s fight against a polluting chemical plant. It was nominated for a 2011 Academy Award for Best Documentary Short.
Watch the video.